Blotter



Patented Mar. 29, 1927.

UNITED STTSQS 15,622,367 ratifiant oFFICE.

connnnrus BULL, on saensunn, aman frvnnnsrnann, NORWAY.

BLTTER.

Application filed July 9, 1925, Serial No. 42,572, and in Norway February 10, 1925.

My invention relates to blotters of the kind that are made of two plate springs clamping the ends of the blotting papers between them. The object of my invention is to provide a blotter of this kind in which the operation of releasing and clamping the blotting papers may be performed by simply moving one of said I'springs up and down. For this purpose I arrange the two plate springs in such relation to each other that the weaker spring is kept locked by the stronger spring in either of two different positions, viz, a position in which it clamps the blotting papers in place, and another position in which the blotting papers are rcleased so that fresh blotting papers may be applied.

In the following specification the invention will be described with reference to the accompanying drawings, illustrating by way of example one embodiment of the invention.

In the drawing Fig. l is a side view of the blotter, and Fig. 2 an end view of the same, but with the blotting` papers removed. Fig. 3 is a plan view of one half of the blotter. Fig. 4 is a plan view of a sheet of blotting paper especially adapted for this kind of blotters.

In the executional form illustrated l designates the lower and stronger of the two plate springs, which by some sort of joint or hinge 2 is connected to (or in engagement with) the ends of the weaker plate spring 3 in such manner that the spring 3 is always kept under a suitable degree of tension by the spring 1.

Adjacent to the ends of the spring l there are cut out tongues 4 that are bent inwards in such manner that a number of sheets 5 of blotting paper may be laid about the outer surface of the spring in such manner that their ends are kept clamped between the tongues 4 and the inner side of the spring 3 (see Fig. l) The spring 3 is provided with a knob 6 or handle of any suitable form. In order to be able to remove or replace one or more of the blotting papers 5 I only have to exert an upward pull on the knob 6, whereby thespring 3 will be shifted to the -position indicated by dotted lines in Fig. l.

The length of the spring 3 being greater than the distance between the joints 2, this movement can only be made by spreading to some degree the ends of the spring l, and when the spring 3 has reached its upper position it will be locked in this position by the rIhe ends of the blotting papers are in! serted through slots ll cut out above thel tongues 4 in the spring l, and for this purpose the ends vshould be tapered or notched, for instance as shown at 10, or reduced in some manner, in order that their middle part may have a width corresponding to that of the plate spring l.

'l`o facilitate the putting on of the papers 5 it may be advantageous to have on one side of the spring l a small tongue or hook 3' adapted to be inserted in a'corresponding slot 9 cut out in the sheets 5. The putting on of the blotting sheets may then be effected by inserting their offset parts l0 in the slot' ll and fitting their slots 9 on the tongue 8. Thereupon the sheets are stretched around the spring l and their opposite ends l0 inserted in the opposite slot 11, whereupon I only have to press down the spring 3 to hav-e the blotter in full working order.

It will be clear that the invention is not restricted to the exemplary embodiment illustrated and described, but comprises every form of blotter arranged in conformity with the main principle of the invention i.`e. the locking of one plate spring in two different positions by the pressure of the other plate spring. rIhe jointsbetween the springs need not be in the form of hingesk as illustrated but may simply consist of grooves in the stronger springin which the ends of the weaker spring are inserted.

l. In blotters made of two plate springs clamping the blotting` paper sheets between them, the combination of a stronger plate spring arranged in such manner in relation to a weaker plate spring as to lock the latter in either of two different positions, in one of which the blotting papers are clamped between said springs, and in the other of which they are loose.

llO

2. In blotters made of two plate springs clamping the blotting paper sheets between them, the combination of a stronger plate spring arranged in such a manner in relation to a weaker `plate spring as to lock the latter in either of two different positions, in one of which the blotting papers are clamped between said springs, and in the other of which they are loose, and joints between said springs, the weaker spring having a greater length than the distance between said joints,

3. In blotters made ot two plate springs clamping the blotting paper sheets between them, the combination of a stronger plate spring arranged in such a manner in relation to a weaker plate spring as to lock the latter in eithervof two dih''erent positions, in one of which theblotting papers are clamped between said springs, and in the other ot which they are loose, t-he weaker spring being arranged above lthe stronger spring and connected with its ends to said stronger spring by aid ot' joints, spaced at a shorter distance than the length ot the weaker spring.

t. In blotters made of two plate springs clamping the blotting paper sheets between them, the combination of a stronger plate springy arranged in such a manner in relation to a weaker plate spring as to lock the latter in either of two different positions, in one of which the blotting papers are clamped between said springs, and in trie other oit which they are loose, the stronger spring having inturned tongues adapted to clamp the ends of the blotting papers between them and the underside of the weakersprino".

5. In blot-ters made of two plate springs clamping the blotting paper sheets between them, the combination of a stronger plate spring arranged in such a manner in relation to a weaker plate spring as to lock the latter in either oi" two different positions, in one of which the blotting papers are clamped between said springs, and inthe other of which they are loose, the stronger spring having intnrned tongues adapted to clamp the ends of the blotting `papers between them and the underside ot the weaker spring and slots in said stronger spring adjacent said inturned tongues permitting the ends of said papers to passthrough said stronger sprinO'.

6. In blotters made of two `plate springs clamping the blotting paper sheets between them, the combination ot a stronger plate spring arranged in such a manner in relation to a weaker plate spring as to lock the latter in either of two diterent positions, in one ot which the blotting papers are clamped between said springs, and in the other ot which they are loose, the stronger spring `having' inturned tongues adapted to clamp the ends of the blotting papers between them and the` underside ot the weaker spring, slots in said stronger `spring' adjacent said inturned tongues permitting the ends of said papers to pass through said stronger spring, and an outtnrned tongue on said stronger spring for engagement with a corresponding slot in the blotting paper sheet. y i

In testimony that `I claim the foregoing as my invention, `I have signed my name.

CORNELIUS BULL. 

